Atlas is pleased to present…

What Is a Radiant Barrier? The Turkey Analogy

What Is a Radiant Barrier? A radiant barrier is a layer of aluminum foil placed in an airspace to block radiant heat transfer between a heat-radiating surface (such as a hot roof) and a heat-absorbing surface (such as conventional attic insulation).

Where Does Atlas Fit In? One Step Insulation and Radiant Barrier Panels: ACFoam® Crossvent™ RB One Step Insulation and Radiant Barrier Panels: ACFoam® Crossvent™ RB Radiant Barrier Radiant Barrier EPS Spacer Strips EPS Spacer Strips ACFoam Polyiso Insulatio n ACFoam Polyiso Insulatio n Plywood or OSB Plywood or OSB

Heat Flow Breakdown in a Typical Home 35 % 10 % 26 % 7%7% 22 % Infiltration

Comfort (cooler interior) Reduced HVAC demand SAVE $$$ Save Energy and the Environment Benefits of Radiant Barriers

Foil reflects very well Emits very poorly Does not radiate heat to insulation How Do Radiant Barriers “Block” Heat Transfer?

Reflectivity (reflectance) How much radiant heat is reflected 0 –100% Emissivity (emittance) How much radiant heat is given off (emitted) 0-100% Together they equal one (1.0) Let’s Get Technical Key Terms and Concepts

What’s Happening on Your Roof? Heat Penetration without Radiant Barrier Heat Penetration without Radiant Barrier Home Stays COOL with ACFoam CrossVent RB Home Stays COOL with ACFoam CrossVent RB Let’s Compare...

Before and After Radiant Barrier: Attic Air Temperature June 1st May 20th May 10th

Foil Side Facing Down Must have an air space How does radiant heat transfer? Cannot contact another surface Where Does the Radiant Barrier Go?

Where Does a Radiant Barrier Go? Most Desirable Most Desirable Least Desirable Least Desirable

Where Does ACFoam CrossVent RB Go? ACFoam CrossVent panels are installed above the deck, under the shingles, the perfect place to prevent Heat Penetration ACFoam CrossVent panels are installed above the deck, under the shingles, the perfect place to prevent Heat Penetration

Installation Easy to Handle Easy to Handle Fasten to Deck Fasten to Deck Convenient 4’ x 8’ Panels Convenient 4’ x 8’ Panels

Installation

Reduces heat gain through R-19 insulation by 40% >20% of cooling load through roof 8-20% reduction in cooling energy costs How Much Can Radiant Barriers Save? Note: According to Florida Solar Energy Center, University of Central Florida, FPC Residential Monitoring Project

$0.10-$1.00/sq. ft. for materials $0.15-$1.00/sq. ft. for labor Average $.25 to $1.00 per sq. ft. Pay Back of 6-10 years What Does a Radiant Barrier Cost? *Florida Solar Energy Center, University of Central Florida, Radiant Barriers: A Question and Answer Primer

Only 2 to 5 degree increase Shingles often reach degrees Increase of 2 to 5 degrees is insignificant Will Heat Build Up in the Roof and Damage Shingles?

Atlas manufacturers Asphalt Roofing Shingles and accepts radiant barriers as outlined in the terms of the Atlas Limited Warranty. What About my Atlas Shingle Warranty

Radiant Barriers save energy and money Doesn’t require separate step Built into CrossVent RB—no extra labor Annual energy savings $$ Quick payback Excellent life cycle cost Passive energy saving method Improved occupant comfort Conclusions

…polyiso insulation that provides unsurpassed thermal efficiency. …a perforated, breathable, low-emissivity foil radiant barrier securely bonded to OSB. …a radiant barrier panel that reflects up to 97% of the sun’s radiant energy. …an additional 7-10% savings annually on cooling costs.* …a 20-year thermal limited warranty. Only CrossVent® RB substantially limits Conductive AND Radiant Heat Transfer

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